mips_opcode.h revision 1.2
1 /*- 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Ralph Campbell. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)mips_opcode.h 8.1 (Berkeley) 6/10/93 37 * $Id: mips_opcode.h,v 1.2 1994/05/27 08:40:44 glass Exp $ 38 */ 39 40 /* 41 * Define the instruction formats and opcode values for the 42 * MIPS instruction set. 43 */ 44 45 /* 46 * Define the instruction formats. 47 */ 48 typedef union { 49 unsigned word; 50 51 #if BYTE_ORDER == LITTLE_ENDIAN 52 struct { 53 unsigned imm: 16; 54 unsigned rt: 5; 55 unsigned rs: 5; 56 unsigned op: 6; 57 } IType; 58 59 struct { 60 unsigned target: 26; 61 unsigned op: 6; 62 } JType; 63 64 struct { 65 unsigned func: 6; 66 unsigned shamt: 5; 67 unsigned rd: 5; 68 unsigned rt: 5; 69 unsigned rs: 5; 70 unsigned op: 6; 71 } RType; 72 73 struct { 74 unsigned func: 6; 75 unsigned fd: 5; 76 unsigned fs: 5; 77 unsigned ft: 5; 78 unsigned fmt: 4; 79 unsigned : 1; /* always '1' */ 80 unsigned op: 6; /* always '0x11' */ 81 } FRType; 82 #endif 83 } InstFmt; 84 85 /* 86 * Values for the 'op' field. 87 */ 88 #define OP_SPECIAL 000 89 #define OP_BCOND 001 90 #define OP_J 002 91 #define OP_JAL 003 92 #define OP_BEQ 004 93 #define OP_BNE 005 94 #define OP_BLEZ 006 95 #define OP_BGTZ 007 96 97 #define OP_ADDI 010 98 #define OP_ADDIU 011 99 #define OP_SLTI 012 100 #define OP_SLTIU 013 101 #define OP_ANDI 014 102 #define OP_ORI 015 103 #define OP_XORI 016 104 #define OP_LUI 017 105 106 #define OP_COP0 020 107 #define OP_COP1 021 108 #define OP_COP2 022 109 #define OP_COP3 023 110 111 #define OP_LB 040 112 #define OP_LH 041 113 #define OP_LWL 042 114 #define OP_LW 043 115 #define OP_LBU 044 116 #define OP_LHU 045 117 #define OP_LWR 046 118 119 #define OP_SB 050 120 #define OP_SH 051 121 #define OP_SWL 052 122 #define OP_SW 053 123 #define OP_SWR 056 124 125 #define OP_LWC0 060 126 #define OP_LWC1 061 127 #define OP_LWC2 062 128 #define OP_LWC3 063 129 130 #define OP_SWC0 070 131 #define OP_SWC1 071 132 #define OP_SWC2 072 133 #define OP_SWC3 073 134 135 /* 136 * Values for the 'func' field when 'op' == OP_SPECIAL. 137 */ 138 #define OP_SLL 000 139 #define OP_SRL 002 140 #define OP_SRA 003 141 #define OP_SLLV 004 142 #define OP_SRLV 006 143 #define OP_SRAV 007 144 145 #define OP_JR 010 146 #define OP_JALR 011 147 #define OP_SYSCALL 014 148 #define OP_BREAK 015 149 150 #define OP_MFHI 020 151 #define OP_MTHI 021 152 #define OP_MFLO 022 153 #define OP_MTLO 023 154 155 #define OP_MULT 030 156 #define OP_MULTU 031 157 #define OP_DIV 032 158 #define OP_DIVU 033 159 160 #define OP_ADD 040 161 #define OP_ADDU 041 162 #define OP_SUB 042 163 #define OP_SUBU 043 164 #define OP_AND 044 165 #define OP_OR 045 166 #define OP_XOR 046 167 #define OP_NOR 047 168 169 #define OP_SLT 052 170 #define OP_SLTU 053 171 172 /* 173 * Values for the 'func' field when 'op' == OP_BCOND. 174 */ 175 #define OP_BLTZ 000 176 #define OP_BGEZ 001 177 #define OP_BLTZAL 020 178 #define OP_BGEZAL 021 179 180 /* 181 * Values for the 'rs' field when 'op' == OP_COPz. 182 */ 183 #define OP_MF 000 184 #define OP_MT 004 185 #define OP_BCx 010 186 #define OP_BCy 014 187 #define OP_CF 002 188 #define OP_CT 006 189 190 /* 191 * Values for the 'rt' field when 'op' == OP_COPz. 192 */ 193 #define COPz_BC_TF_MASK 0x01 194 #define COPz_BC_TRUE 0x01 195 #define COPz_BC_FALSE 0x00 196
Indexes created Mon Sep 22 13:09:51 GMT 2025